*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}
.built-in-app{
	width: 700px;
	margin: auto;
}
.built-in-app .nav>li{
	list-style: none;
	display: inline-block;
	position: relative;
	padding: 5px 10px;
	cursor: pointer;
	font-size: 15px;
	font-weight: 700;
	border-bottom: 1px solid #fff;
}
.built-in-app .nav>li:hover{
	color:#FF4400;
	border-bottom: 1px solid #F40;
}


.built-in-app .main > div{
	display: none;
}
.built-in-app .main > .active{
	display: block;
	padding-top: 10px;
}
.main .active p{
	padding-top: 5px;
	font-size: 14px;
}
.main .active a{
	padding-top: 5px;
	display: inline-block;
	font-size: 14px;
	    color: #3C3C3C;
	    text-decoration: none;
	        overflow: hidden;
}
